/*
 * File    : PRUDPPacketReplyConnect.java
 * Created : 20-Jan-2004
 * By      : parg
 * 
 * Azureus - a Java Bittorrent client
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package connect.dht.transport.udp;

/**
 * @author parg
 *
 */

import java.io.*;
import java.net.InetSocketAddress;
import java.util.List;

import connect.dht.transport.DHTTransportAlternativeContact;
import connect.dht.transport.DHTTransportContact;
import connect.dht.transport.udp.DHTTransportUDP;
import connect.dht.transport.udp.DHTUDPPacketNetworkHandler;

public class 
DHTUDPPacketReplyPing
	extends DHTUDPPacketReply
{
	private static final DHTTransportAlternativeContact[] EMPTY_CONTACTS = {};
	
	private DHTTransportAlternativeContact[]	alt_contacts = EMPTY_CONTACTS;
	
	public
	DHTUDPPacketReplyPing(
		DHTTransportUDPImpl		transport,
		int						trans_id,
		long					conn_id,
		DHTTransportContact		local_contact,
		DHTTransportContact		remote_contact )
	{
		super( transport, DHTUDPPacketHelper.ACT_REPLY_PING, trans_id, conn_id, local_contact, remote_contact );
	}
	
	protected
	DHTUDPPacketReplyPing(
		DHTUDPPacketNetworkHandler		network_handler,
		InetSocketAddress				originator,
		DataInputStream					is,
		int								trans_id )
	
		throws IOException
	{
		super( network_handler, originator, is, DHTUDPPacketHelper.ACT_REPLY_PING, trans_id );
				
		if ( getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_VIVALDI ){

			DHTUDPUtils.deserialiseVivaldi( this, is );
		}
		
		if ( getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_ALT_CONTACTS ){
			
			alt_contacts = DHTUDPUtils.deserialiseAltContacts( is );
		}
	}
	
	public void
	serialise(
		DataOutputStream	os )
	
		throws IOException
	{
		super.serialise(os);
		
		if ( getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_VIVALDI ){

			DHTUDPUtils.serialiseVivaldi( this, os );
		}
		
		if ( getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_ALT_CONTACTS ){
			
			DHTUDPUtils.serialiseAltContacts( os, alt_contacts );
		}
	}
	
	protected void
	setAltContacts(
		List<DHTTransportAlternativeContact>	_contacts )
	{
		final int MAX_CONTACTS = 16;
		
		if ( _contacts.size() < MAX_CONTACTS ){
		
			alt_contacts = _contacts.toArray( new DHTTransportAlternativeContact[ _contacts.size()]);
			
		}else{
			
			alt_contacts = new DHTTransportAlternativeContact[MAX_CONTACTS];
			
			for ( int i=0;i<alt_contacts.length;i++){
				
				alt_contacts[i] = _contacts.get(i);
			}
		}
	}
	
	protected DHTTransportAlternativeContact[]
	getAltContacts()
	{
		return( alt_contacts );
	}
	
}
